Electronic flash unit



FIG. 1 is a top plan view of an electronic flash unit, showing our newdesign;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is right side view thereof; and

FIG. 6 is a bottom plan view thereof.

The ornamental design for an electronic flash unit, substantially asshown.